Patent US3539802A successfully refreshed from Google Patents.
US3539802A
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Assignee: Emerson Electric Co
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Filing: 1968-05-31
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Granted: 1970-11-10
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Expires: 1988-05-31
Abstract
No abstract record available.
Inventors
- 👤 Willard R Garnett
- 👤 Walter J Trantina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:53
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21V; F21V17/00; F21V17/10; F21V17/101; F21V17/16; F21V17/164; F21V17/166; F21V23/00; F21V3/00; F21Y; F21Y2103/00; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0876; Y10T292/0883
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-09 | 1974-05-11 | 1974-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-09 | 1978-05-11 | 1978-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-09 | 1982-05-11 | 1982-11-10 | $7700.00 | Window Closed / Lapsed |